Excerpt from the report: The primary objectives of the research reported here were: (1) to determine, under actual field conditions, the relative effectiveness of malathion and two basic types of chemically inert dusts when mixed with wheat for the control of insect infestations over a long period of storage; (2) to determine their effectiveness in preventing subsequent reinfestation of the stored wheat by stored-grain insects; (3) to determine under actual field conditions the practical problems encountered when inert dusts were used to treat grain; and (4) to determine the effect of the treatments on the milling properties of wheat and baking properties of the flour milled from the treated wheat.